The increasing cost of science and engineering books in both print and electronic format continues to challenge academic libraries' ability to support teaching, learning and research. Libraries are under pressure to meet the growing need of electronic resources with a flat or shrinking budget. To seek a solution to this phenomenon, the Stony Brook University Libraries works with publishers to implement an Evidence-Based Acquisition (EBA) model in engineering and science. Using this EBA model, the Stony Brook University Libraries empowers users to participate in purchase decisions on ebooks at the end of the agreed period with the publisher. Before the final purchase of the science and engineering ebooks, users have full access to over 3000 ebooks in the collection. This study is to understand the use pattern of ebooks acquired through EBA model versus subscriptions by analyzing use reports, percent used, and use intensity. The use comparison of two acquisition models provides insights on the ebook collection strategy and EBA impact. The implementation process on the Alma/Primo VE platform is also shared.

印刷和电子形式的科学和工程书籍成本不断增加，继续挑战学术图书馆支持教学、学习和研究的能力。图书馆面临着压力，需要以持平或缩减的预算来满足日益增长的电子资源需求。为寻求解决这一现象，石溪大学图书馆与出版商合作，在工程和科学领域实施基于证据的采集 (EBA) 模型。使用此 EBA 模型，石溪大学图书馆授权用户在与出版商商定的期限结束时参与对电子书的购买决策。在最终购买科学与工程电子书之前，用户可以完全访问馆藏中的 3000 多本电子书。本研究旨在通过分析使用报告、使用百分比和使用强度来了解通过 EBA 模型获取的电子书与订阅的使用模式。两种获取模式的使用比较提供了有关电子书收集策略和 EBA 影响的见解。在 Alma/Primo VE 平台上的实现过程也被共享。